"Some initial findings... indicate that levels of virus in those who become infected with Delta having already been vaccinated may be similar to levels found in unvaccinated people," Public Health England said in a statement.
In England, hundreds of vaccinated people hospitalis... 
英國發現 疫苗可能無助防止Delta變異株傳播 | 國際 | 中央社 CNA 
Emerging signs COVID-19 vaccines may not stop Delta ...
In England, hundreds of vaccinated people hospitalis... 英國發現 疫苗可能無助防止Delta變異株傳播 | 國際 | 中央社 CNA Emerging signs COVID-19 vaccines may not stop Delta ...